HP stands for Helicobacter pylori, an anaerobic bacterium that can survive in an acidic stomach environment and is a common cause of gastric disorders. To find out if there is H. pylori infection in the stomach, a C13 and C14 breath test can be used to confirm the diagnosis. A positive HP test is indicated by the presence of H. pylori infection, and the higher the plus sign, the more severe the infection. Patients who are diagnosed with the infection should be treated with a combination of medications, mainly clarithromycin, metronidazole, amoxicillin, and omeprazole. Patients should be treated with adequate courses and doses, and should be reviewed after cure. Those who have been eradicated pay attention to dietary care in their future life to avoid re-infection.